深成岩

深成岩（英語：plutonic rock）是一種火成岩，生成於地殼的較深處(>2 km)，因為在地下緩慢冷卻，使得礦物具有大的結晶粒度。常為斑岩紋理。常見的深成岩有花崗岩、輝綠岩(粗玄岩（英語：dolerite）)。^[1]^[2]

另一概念侵入岩（英語：intrusive rock）是指由火成侵入作用形成的火成岩，經常被視為深成岩的同義詞。^[3]

語源

plutonic rock這個英文術語起源於羅馬神話中地下世界的主宰冥王普魯托。十八世紀末水成論與火成論的地質學大論戰時命名。pluton也被視為火成侵入的同義詞。

^ Examples of rocks with different names. [12 June 2015]. （原始內容存檔於2020-05-06）.
^ Igneous rock types - Australian Museum. [14 June 2015]. （原始內容存檔於2015-06-03）.
^ Igneous Rocks. National Park Services, U.S. Department of Interior. [2023-12-21]. （原始內容存檔於2024-02-11）（英語）. Intrusive igneous rocks solidify within Earth. These rocks are also known as plutonic rocks

Glazner, A. F., Bartley, J. M., Coleman, D. S., Gray, W. and Taylor, R. Z. (2004). "Are plutons assembled over millions of years by amalgamation from small magma chambers?" GSA Today, 14 (4: April), pp. 4–11.
Young, Davis A. (2003). Mind Over Magma: the Story of Igneous Petrology. Princeton University Press. ISBN 0-691-10279-1.
Best, Myron G. (1982). Igneous and Metamorphic Petrology. San Francisco: W. H. Freeman & Company. pp. 119 ff. ISBN 0-7167-1335-7.